Improvement in the manufacture of granulated sugar



strut Gtjiilire CARL "WANDEL, OF WALDAU, NEAR BERNBURG, NORTH GERMANGONFEDERATION,

ASSIGNOR TO F. O. MATTHIESSEN, AND W. A. WIEOHERS, OF NEW YORK CITY.

Letters Patent No. 92,406, dated July 6, 1869. T

The Schedule referredtoin these Letters Patent and making part of thesame To all whom it may concern.-

Be it known that I CARL \VANDEL, of -W'aldau, near Bernburg, in theDuchy of Auhalt, North German Confederation, have discovered a new anduseful I-mprovement in the Manufacture of Granulated Sugar; and I dohereby declare that the tbllowing is a full, clear, and exactdescription of the same.

There are two methods in ordinary use for-the manufacture of thatproduct of refined sugar known as granulated sugar. The one of theseconsists in shaving off or grinding hard white loaf-sugar, and theother, in taking soft white sugar made by the centrifugal machine, anddrying it on heated plates or granulating-tables. Both of these methodsare comparatively expensive, and otherwise objectionable, and under thelast mentioned plan it is necessary to keep constantly stirring thesugar on the tables, to prevent too long contact of any one portion ofthe sugar over another with the heating-surface, or otherwise the sugarbecomes colored, and waste ensues, which cannot, in fact, under the mostcareful management, be altogether avoided.

The present invention removes these objections, and has for its objectthe manufacture of granulated sugar in a more economical and perfectmanner, without waste or loss; and

The invention consists in making such product directly in thecentrifugal machine, by injecting dry steam or hot air against the wallof sugar therein. This may be done without or .prior to removal of thesoft white sugar, as obtained in the ordinary or any suitablecentrifugal machine, either before or after the same has been washedwith water, or any other suitable cleansing liquid, as, for instance, byinjection through a hose and nozzle against the wall of sugar on tlieinside of the machine whilst running, which is the ordinary method, andwhich leaves the sugar with more or less of moisture in it, generallyfrom two (2) to five (5) percent. To dry the sugar, and efi'ect itsgranulation whilein the machine, I similarly inject, that-is, by hoseand nozzle, provided with a stop-cock, or other suitable means, againstthe interior of the wall of sugar as it is rotated, dry steam or hotair. 'll1us, if steam be used, it is first passed through any properlyconstructed superheater, on its way from the boiler to the nozzle thatdirects it against the sugar, with or without the aid of an injector, orother mechanical auxiliary.

Or, if hot air be used, the same similarly injected against the sugarby, for instance, forcing air through any suitable heater, to andthrough the distributinghose and nozzle, by means of an injector,blower, force: pump, or other mechanical device. The dry steam, orhot-air, thus injected against the sugar is made to permeate it, in thesame manner as the liquoring or washing is efi ected by hose and nozzle,and thus the drying and granulation of the sugar secured while in thecentrifugal machine.

\Vhat is here claimed, and desired to be secured by Letters Patent, is-

Themanufiicture of granulated sugar, while in the centrifugal machine,by the injection of a current or currentsof superheated steam, or. hotair, against the wall of sugar therein, substantially as specified.

:CARL WANDEL.

Witnesses: v

HENRY '1. BROWN, J. O. BONNER.

